CN2145083Y

CN2145083Y - Handsaw with adjustable bow beam

Info

Publication number: CN2145083Y
Application number: CN 92220416
Authority: CN
Inventors: 杨家庆
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-09-22
Filing date: 1992-09-22
Publication date: 1993-11-03
Anticipated expiration: 2002-09-22

Abstract

The utility model relates to a handsaw with an adjustable saw bow beam. The handsaw is composed of a saw bow beam (1), a saw blade (2), a saw blade locking wheel (3), an opening nut (4) and a handle (5), wherein, the saw bow beam is telescopic. Because the saw blades with any length can be used, the utilization rate of the old saw blade after broken off is enhanced. The utility model has the advantages of reasonable structure, easy fabrication, low cost and convenient operation.

Description

Handsaw with adjustable bow beam

The utility model belongs to hardware hand-held tool technical field.

At present, the hand saws of general usefulness is to be regulated with saw blade length by three teeth on the saw bow bar, its not flexible of saw bow beam.If the saw blade after fractureing will continue to use, the saw blade length that then fractures must could be used within effective adjustable range of three teeth of saw bow bar.The more like this saw blade that fractures can not utilize again, causes the saw blade waste big.And before use fractures saw blade, after also will earlier an end of fracture being annealed and be holed, again with cooperating fastening with saw bow in the lateral pin insertion saw blade hole.Even so the old saw blade that has fractureed can utilize again, also time-consuming.In addition, Chinese patent 85201381 " general handsaw ", though its saw bow beam is scalable, yet its structure is different fully with the utility model, it is to regulate the flexible of saw bow beam according to the positive and negative line double thread connector in the middle of the saw bow beam, flexible being limited in scope.

In order to overcome the shortcoming and defect that existing hand saws exists, in order to make the telescopic scope of saw bow beam big, can save saw blade widely, the purpose that old breaking saw blade is easy to use, the utility model provides a kind of adjustable saw bow beam handsaw of novelty.

The utility model mainly is to be made of saw bow beam (1), saw blade (2), saw blade locking wheel (3), opening nut (4), handgrip (5).Its saw bow beam (1) has trapezoidal thread, cooperates the length that can regulate the saw bow beam arbitrarily with the opening nut (4) with identical screw thread.And have on the opening nut (4) two small one and large one be symmetrically 180 ° groove, it is free that the saw bow beam is passed in and out between two grooves, the opening nut can rotate the angle of 0 °＜α＜360 °, plays the effect that saw blade is tightened.The saw blade anchor clamps are the sleeve pipe (45 that the groove that circles round is arranged in saw blade locking wheel (3) adopts ^#Steel sleeve) draw a lot of the circle round groove identical with saw blade in, and have a road junction on sleeve pipe, make saw blade insert sleeve pipe from opening part, revoling tube pins saw blade.Owing to adopted this saw blade locking wheel, so the saw blade two ends of using do not require boring, this has just reduced the production process of saw blade, saved workload and time, the old saw blade that fractures of general any length all can use, and is also very convenient, need not anneal and hole, therefore saved saw blade greatly.

Advantage of the present utility model, its saw bow beam is adjustable, and bigger retractility is arranged, and the saw blade of any like this length all can use, and the back saw blade utilization rate that fractures improves greatly, has avoided the waste of saw blade.And simplified new saw blade manufacturing procedure, old breaking saw blade does not need to anneal and boring with preceding again, has saved operation and time.Therefore the utility model is rational in infrastructure, makes easily, and is with low cost, easy to use, can bring bigger economic benefit and social benefit.

Description of drawings:

Fig. 1 is adjustable saw bow beam handsaw schematic diagram;

(1) saw bow beam wherein, (2) saw blade, (3) saw blade locking wheel, (4) opening nut, (5) handgrip.

Fig. 2 saw bow beam A-A cutaway view;

(1) saw bow beam wherein

Fig. 3 saw blade locking wheel structure chart.

(3) saw blade locking wheel wherein.

Claims

1, a kind of adjustable saw bow beam handsaw is characterized in that: it is to be made of saw bow beam (1), saw blade (2), saw blade locking wheel (3), opening nut (4), handgrip (5).

2, according to the described adjustable saw bow beam handsaw of claim 1, it is characterized in that: the opening nut (4) that saw bow beam (1) has trapezoidal thread to have identical trapezoidal thread with it cooperates, also have on the opening nut (4) two small one and large one be symmetrically 180 ° groove.

3, according to claim 1,2 described adjustable saw bow beam hand distances, it is characterized in that: saw blade locking wheel (3) is to draw a lot of the circle round groove identical with saw blade in the steel sleeve, and on steel sleeve, drive the saw blade retaining mechanism at a road junction, saw blade inserts revoling tube pinning saw blade in the sleeve pipe from opening part.

4, according to claim 1,2 described adjustable saw bow beam handsaws, it is characterized in that: its saw blade was both available general hole saw blade, also available no hole saw blade.

5, according to the described adjustable saw bow beam handsaw of claim 3, it is characterized in that: its saw blade was both available general hole saw blade, also available no hole saw blade.